$OpenBSD: patch-src_http_cpp,v 1.1 2015/11/21 15:34:46 jca Exp $
--- src/http.cpp.orig	Thu Nov 19 22:17:01 2015
+++ src/http.cpp	Thu Nov 19 22:18:16 2015
@@ -35,6 +35,7 @@
 #include <time.h>
 #include <sys/stat.h>
 #include <string.h>
+#include <cerrno>
 
 #ifdef  _MSC_VER
 #pragma message("Using exiv2 http support")
